Disk drill.



H. II. HUGHES.

DISK DRILL.

APPLICATION FILED FEB. 4. I9I5 z Nlmllllullll Patented Nov. 7, 1916 H. R. HUGHES DISK DRILL.

PPUCTON FILED FEB. 4A tgv). 1 ,20/L 1 57. Patented Nov. 7', 1916.

4 2 SHEETS-SHEET 2.

#devices made lof steel.

deexcellent bearings ito the fact that the cuttersare mounted on integral 4spindles .on the and are retained 111 head of the drill operative position by The bronze bushings et operating on steel bearing members 3P prorings are` inexpensive to manufacture and .maintain As shown in Fig.' 1, the head Ai is providedadjacent the inner ends of the spindles `2 with, integral'-end-thrust-res1sting bearing surfaces 5 that take np' thrusts that are exerted varrange washers 6 of bronze, or other suit- ,able wear-resisting material, between the inner sides of thefcutters B Vand ,the endthrust bearings on the head so asto; pre- `vent ythe head from becoming worn'.

slightly with relation to each other or -ar- .their axes of rotation slightly-- idly when the advancingedges :v

to turn or notate on'th vsign above described to The cutters B .are preferably offset lbottom of the hole and also cause the cutter. to revolve on its. axis when the head A of` the drillis rotated. In addition to the sharp shearing edges 'and the' crushing surfaces1 7, each 'cutter is provided on itsinner side with a tapered portion that has saw teeth 8.

formed in same, as shown more. clearly in Fig. 4. When the drill is in operationthese smv teeth,8 grabV hold of the. core at the center of the bottom of the hole` and thus break up the core and also assist the disks cir axes, there being cutters B'of they delittle tendency `fox-the remain stationary or Y .not-revolve on ltheir axes when the drill is rotating," owing to the exceptionally large serrated area on the inner vside of the cutter agndon the edge portion of same. f

In,;rder to eliminatetho tendency of the (,:utters B to track,v and. thus not thoroughly breakup the material lat the bottom of the holegyIprefer't-o form the transverse teeth on the. edge portion ot' each cutter of differeut pitckh.- In the drill herein shown each cutter is provided on its edge portion with4 teeth 7 of .a comparatively line pitch and a comparatively coarse pitch. A stationary cutting device. is arranged at the lower end of thehead A 'between the cutters B so as to 'help destroy the core left Standing atthe centerof the hole. the station'ary. cutting device of the Adrill Herein for they cutters, whichl the longitudinal *i y on the cutters B when the drill is in operation. I prefer to` .and around that has cuttlng teeth 7 shown being formed by an Ainverted V- Shaped groove 9 that extends transversely across the lower end face yof the head between the cutters' B, asL shown in Fig.

.When thedrill is 'in operation the sharp edges of the groove 9in the head act on the vtop surface or upper side of the core and the saw ters act on tho outer surface of the core, thereby causing thev core tube completely broken up .and pulverized.

A. lubricating d'nctlOz is formed in the headpas shown in broken lines in Figs. 1 and 2, so us'to, conduct a lubricating' mcdium from a lubricant holder (not shown),

to distributing ducts 1l4 formed in the spin?, f

dles EZ,A said lubricating ducts v having branches 119, as shown in Fig. 1, that lead tothe bearing surfaces on which the cutters revolve.A The head is equipped with the usual watercourses or passzuge-waysy for discharging jets otl'lushing water-'into the bottom of the hole, but the water courses or passage-ways of the drill herein shown are arranged in a novely manner that `tends tov prevent .the disintegrated material fronrbecoming packedtightly. around the cutters the vhead ofthe drill `,when the drill is operating in clayfgumbo and vari-y -ous other soft formations. In the drill hereinA shown the head .A is

provided .with water courses y12 whose lower ends terminate adjacent theupper portions of the disks at the inner sidesofsame, as i and 2, the wafy shownV in full lines in` Figs. l ter co`urse 12 that coperates with each ycutteeth 8 on the inner sides of the cut- I .ico

ter being preferably so. disposed that the jet y of water thatiescapes therefrom will be discharged rdownwardly and outwardly against the inner' face of the cutter atthe lead side of same.- The head is also `provided with end of the head and terminate in the'transverse groove 9 in the lower endface 'of the of water that are discharged from the water courses. 12 keepthe'cutters clean and becoming packed between the cutters f and the 'head of the drilLandfthejets of water that are discharged f rom: the watercourses 13' downwardly .against the disintegrated material at the bottom of the'hole prevent s'ald' material from packing in the groove 9 or in the space between `the lower portions` of the cutters..

'l I prefer to make thewater'passage-ways 3 of greater diameter at the extreme lower end of the head than at a pointfarther up in the head, or, in other wordsg, taper the lower portions of the water passageway/$13 so as to prevent the cuttingsor -disintogra-ted material from becoming'` wedged in said water passage-ways.

im' head.- When thedrillis inservicethe jets l f lil" Consequently, such a'diill is highly practr,

4 cable .tor` general iise in all kinfds ot' forniait can 'he used successfully for drilling sott might occur in case `tlie head of the drilltions in 4whichlisk vdrills can he used successfully, and, as it is provided with exceptionally stronxgr and rigid cutters 'and with adequate means for destroying a center cie,

rock. Y

ln order to eliminate the possibility of the nuts 3- unscrewing or working loose, as

rotates anti-clockwise .during the operation of lowering the drillinto a hole, I have provided each of the spindles 2 with a 1am nut Stliat is mounted on a reduced portion 2 of the 'spindle which is threa led oppositely to the portion or the spindlev on which the init 3 is screwed, the nuts 3 of the drill herein shown having left-hand threads and the jarnnuts Si? having right-hand threads and also tapered inner sides or ends which Aare seated in tapered recesses formed in the outer ends otthe nuts 3, as shown in Fig. 1.

Having thus described my invention, what if claim, and desire to secure by Letters Patf ent. is:

l. A. disk drill, comprising .a head. 'approxiinately dislshaped cutters arranged in CIK an upright position on the outer surface "of j said head and provided with cutting edges' that act on the material. on the side wall `of the hole, and cutting' surfaces on the inner sides of said'cutters that 'act on the sideof the Core at Athe center of the hole and thus progrossively destroy said core. and assist said ,cutters to turn on their axes.

2. A disk drill, comprising a head, substantially disk-shaped cutters arranged in anupiiglit position on the outer side of saidhead and provided v'with cuttingedges that serene oil' the material from the side wall of the hole when the head is rotated'. said cutters being' offset with relation to each other or arranged vwith theiraxes oi" rotation staggered slightly soV that the rear edge portions oi? said cutters will not drag vagainst the side wall olltlie hole. a stationary cutting device in the lower end face oi' the head arranged between said cutters and extending.r substantially parallel to' saine, and radially-disposed entting vedges on the inner sides of the cuttersthat disintegrate the material at thc hott-oni of the hole andalso assist the cutters to turn on their axes.

3. A dish drill, comprising ahead, sul

stantially disk-shaped cutters arranged in.' an upright position onthe outer side of said head and provided on their edge portions with teeth, radially disposed cutting teeth` on the inner sides of said cutters,'and a sta- 7@ Atio'nary cut-ting device in the lower end face of thefliead arranged vbetween said cutters and extending substantially parallel to saine.

4, A disk drill, comprising a head pro-` videdy adjacent its lower end with integral, laterally projecting spindles that are otiset or staggeredslightly with. relation to each other` substantially, disk-shaped `cutters rotatably mounted on said spindles and provided-with cutting edges that shear Oli the 3G material fronrtlie side wall of the hole when the head is rotated, riidially-disposed cuttiiilgr edges on the' inner sides of said cutters that 'disintegrate* the materialat the bottom of the hole, and a recess formed at the lower 35 end face of Ythe head and extending paral-v lei to said ycutters for disintegrating the material at the center of the bottom of the hole. 'i f 5. A Adisk drill,v 'comprisingl a head, ap- 90 proxiinately disk-shaped 'cutters arranged in an upright position on the outside of said head, and means for discharging jets of iushing water downwardly. from the lower end face ofthe head between said cutters, at 95 points below the axes of said cutters andA also downwardly against the inner sides of -said cutters' at points above the axes on which they revolvelj i G. In a disk drill. the combination of ay head. rotatable cutters arranged in an upv` i'iirht'position on the outer side of the head, iiieans for discharging jets of ushing Water laterally from the head against the innerl sidesof said cutters, and indepei'ident means 105 for discharging jets of flushing Water downwardlv from the lowere'nd face of the head at points between said cutters and below the axes about Vwhich theyfievolve.

, 7. A disk drill, comprisinga head, rotav 110 tahlecutters arranged in an upright position on said head and. provided with cutting edges that scrape ofi the material at the side 'Wall of the. hole, said cutters being provided on their inner sides with radially, disposed cutting-1v edges that act on the" side ofthe core atthe center of thehole, and means lor discharging iets of flushing water against the inner sides ot the cutters so as to keep said cutting edges clean.

8. A. cutter for a rotary boring drill consisting of a sulostantiallyv disk-shaped member that is adapted to he arranged' in 'an upright position at one side of the vertical axis' ot the drill, said'cut'ter heingprovided on 125 its inner side ,with saw teeth that act on the 'side ot vthc coi-e ltt standing .at the center `loer adapted to be arranged in an vupright.

position at' one side of the vertical axis of the drill and provided on its edge portionwith cutting teeth and on one of its side mees with substantially saw-shaped cutting teeth that radiate from the exisy of the cutter :ind which uctr on the side center of the hole. A

10.-A rotary cutter for boring drills, consisting of e substantially disk-shaped memher that' is adapted to be arranged in a substantially upright position at,;one side of the vertical axis of the head of the drill, said member having n beveled edge that is provided with transverse cutting teeth, and a tapered vportion on the'` inner side o16 said member lthat equipped with saw-shaped cutting teeth that radiate from' the center of the cutter and which acton'the side of the core at the center of the hole.

of the core at the 11. A disk drill provided with a rotatable cutter of substantially disk-for1n thatiis arranged in an upright position lon the head ofv the drill, said cutter being provided on its edge portion with cutting teeth, some ofj pitch than the rre- Which have e different mailling teeth. -v

12. A disk drillprovided with :a rotatable cutter of substantially diskform that is arranged in an upright position on the head of the drillV etone side ofthe vertical axis of theheadssd cutter beingl provided on its edge port-ion with cutting teeth, some of which' have a different 'pitch than -thefref -meiuing teeth, and approximately radially- 'dieposed teeth on the inner l side of said cutter.

is. .i disk dini prvided with e rotatable cutter of substantially disk form that is arranged in'en upright positionv en the khead of the drill atione side lof the vertical axis of the head, said cutter being' provided on its edge portion with cutting teeth, some of i, parallel tosaid "inn 'the head that extends f downwardly ALamour r which have a dilierent pitch than there.-

f maining teeth, andv saweteeth; on theiinner side of said cutter. f

14. A rotatable .cutter for `boring consisting of 1 a subsia'intially`` disk-sha i member that is adapted 'to be 'arran v111 en upright position on the head of thedrll I different-.pitch than others, and saw teethv on the inner side of said member that :are

presented tolwaid thehead of the` drill. Y

' 15. A. disk, vided in its liver end face'l wit-han yinverted V-sliaped notch that extends transversely V.across the head, 'rotatable cuttershrranged l in en upright position on the headon opposite sides of said notch, saidcutters being ,offset 'with 'relation to'` each other,Y water' courses in the head whose lower `ends termi:

drill, comprisingv a head pronate in said notch',m and independent water courses in the head from which jets of Hushing Water are discharged to dislodge the ma terial that tends to of the cutters. j f

16. A disk drill, comprising a head, rotatableo'utters arranged in an ,upright position on saidhead, e groove lformed in` the lower end ofthe head below the axes. of -said cut y tersl and havin cutting edges 'thatf'extend cutters and a water `course through same andv terminates in the ybottom f "of, said' groove, the lower end ofsaid. `Water coursea being tapered for ythe purpose de scribe.V

signature in the `presence of two witnesses,

this twenty-eighth dayofJanuary 1915.

OWARD R. HUGHES.v lWitnesses: l I f FRANK C. Crime, NADINE Ln Glos.

la'dhere to the inner sides f In testimony whereof-I hereunto aiix` my 

